Enhanced heat transfer in a triangular ribbed channel with longitudinal vortex generators

Heat transfer and pressure drop in a channel with multiple 60° V-baffles

“…They found that at α = 60°, the highest Nusselt number and [11] experimentally investigated the effect of using winglet vortex generators in common with several ribs on heat transfer and friction characteristics in an uniform heat flux channel and found that the heat transfer rate increases considerably for using both enhancement devices and is about 50-80% of using a single enhancement device. Promvonge et al [12] examined numerically the laminar heat transfer enhancement in a square channel with 45°inclined baffle on one wall and reported that a single streamwise vortex flow occurs throughout the channel and helps to induce impingement jets on the upper, lower and side walls.…”

Enhanced heat transfer in a heat exchanger square-duct with discrete V-finned tape inserts

“…[8] The Nusselt number and friction factor values for the DFT inserts are correlated as functions of Re, Pr, R B and R P , and they are formulated as in Eqs. (13) and (14). Correlations for Nusselt number (14) The plots of the Nusselt number and friction factor of the DFT insert, predicted by Eqs.…”

“…Correlations for Nusselt number (14) The plots of the Nusselt number and friction factor of the DFT insert, predicted by Eqs. (13) and (14) and measured data are depicted in Figs. 7(a) and 7(b), respectively.…”

“…Promvonge et al [13], Chompookham et al [14] and Thianpong et al [15] examined the effects of ribs and winglet type vortex generators (WVGs) on heat transfer in a channel and reported that the Nusselt number and the friction factor for utilizing both the rib and the WVGs are found to be considerably higher than those for using the rib or the WVGs alone. Skullong and Promvonge [16] investigated the heat transfer and flow friction characteristics in a solar air heater channel fitted with delta-winglet type vortex generators.…”

Heat transfer augmentation in a circular tube with winglet vortex generators

“…Promvonge et al [24]. Two pairs of WVGs at different attack angles (α) were mounted on the test duct entrance to create longitudinal vortex flows through the test channel.…”